/Engine/Plugins/Runtime/Metasound/Source/MetasoundGraphCore/Public/MetasoundOperatorSettings.h
In order to achieve SIMD alignment, target block rates must be adjusted to match the boundaries of the given sample rate and SIMD alignment.GetActualBlockRate()returns the true block rate after adhering to sample rate and SIMD boundaries.
void SetTargetBlockRate ( float InTargetBlockRate )